SOUND TOWN ST-UPDM4C Audio Mixers and Amplifiers User Manual

USER MANUAL
PROFESSIONAL POWER AMPLIFIER

 Important Safety Instructions

Warning: To reduce the risk of electric shock, do not disassemble this amplifier. No user serviceable parts inside. Please contact authorized service personnel when need maintenance.
This unit has been engineered and manufactured to assure your personal safety. Improper use can result in potential electrical shock or fire hazards. In order not to defeat the safeguards, observe the following instructions for its installation, use and servicing.

• Read these instructions.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not expose this apparatus to rain or moisture.
• Clean only with dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
• The equipment should be connected to power outlet with grounded protective power grid.
• Protect the power cord from being walked or pinched. Unplug the power cord during lightning storms or when unused for long periods of time.

Certification Notice

We declare our devices are compliant with the following directives and/or standards 2004/108/EC (Electromagnetic Compatibility) directives.

• EN55103-1, EN55103-2, EN61000-3-2, EN61000-3-3 AND E4, E5 ELECTROMAGNETIC
• 2006/95/EC LOW VOLTAGE DIRECTIVES EN60065 ENVIRONMENT DIRECTIVE
• 2004/108/EC ELECTROMAGNETIC COMPATIBILITY DIRECTIVE
• FCC ELECTROMAGNETIC RADIATION DIRECTIVE 15.109
• IEC CISPR Pub.22 ed 6.0 (2008-09) CHAPTER 7.1.1, PART 15.107
• IEC CISPR Pub.22 ed 6.0 (2008-09) CLASS B

Front/Rear Panel Function Diagram

Front Panel:

Rear Panel:

DIP Switch Instructions:

| Al Inputs Independent (Default setting)
All channels remain independent i this setting, may be used for 4 different signals.
---|---
| ‘Three Channel Inputs Signal Linked (3 Channels in Parallel)
Adjust the 4 dip switches can connects Ch1, Ch2 & Ch3 inputs together. One signal can feeds 3 channels. Each channel’s gain control and loudspeaker connection remain independent. The rest 1 channel remain independent input.
| Two Channel Inputs. Signal Linked (2 Channels in Parallel)
Adjust the 2 dip switches can connects both Gt & Ch2 inputs together. One signal can feeds both channels. Each channel’s gain control and loudspeaker connation remain independent. The rest 2 channels remain independent inputs.
| Al inputs linked (4 Channels in Parallel)
Adjust the 6 dip switches can connects all 4 channel inputs together. One signal can
feeds 4 channels. Each channel’s gain control and loudspeaker connection remain
independent.

Caution: Do not connect different inputs 10 each side of a channel when these channels are in parallel. Only 1 connected input will feed all parallel channels. One of the rest parallel channels can be used as signal lisk out to another apparatus. (A male to male XLR cable will be required for the linking out)

Product Briefing

UPDM (Unipolar Pulse Density Modulation) amplifier is the latest generation power amplifier with an ultra-low power consumption.
Durable 1 RU chassis rack mountable.
Intelligent Cooling System.

Product Highlights

• 90V~264V AC global power supply
• Redundancy PSU system
• Ground and signal source noise reduction
• Direct energy amplifying
• Constant zero distortion power control
• Dual reactor phase shift control
• Dynamic energy recycling
• Soft protection of overheat and clip

Specification

Protection Functions

• Overload Protection
  This amplifier has output current protection. Output current will be limited when exceeds the allowed maximum value. When a channel of the amplifier output current exceeds allowed maximum value (for example short circuit), the ampiifier will be disabled (muted) for 1000ms. The amplifier will restart after the short circuit comes back to normal.

• Input Voltage Protection
  When the input voltage is higher than the upper limit or lower than the lowest limit, PSU will enter protect mode and cut off the power supply.

• New Generation Redundancy Power Supply System
  This amplifier uses 2 identical PSU in one chassis. Controlled by specifical power management chips for load balance and redun- dancy. Backup PSU will work alone when main PSU fails. So dual PSU will supply more power and stability.

• Temperature Protection
  The amplifier comes with complete temperature detection, and monitors both PSU and amplifier simuitaneously. Output power will be limited when the temperature of the heatsink higher than the maximum limit and power output will be cut off. The amplifier will restart when temperature fretum to normal.

Typical Test Curve

Audio Precision

Sweep| Trace| Color| Line Style| Thick| Data| Axis Comment
---|---|---|---|---|---|---
1| 1| Yellow| Solid| 1| Anlr. LevelA| Left
2| 1| Red| Solid| 1|  Anlr. LevelA| Left
3| 1| Magenta| Solid| 1|  Anlr. LevelA| Left

Frequency response: 4 Ohm (Yellow) , 8 Ohm (Red) and open load (Magenta)

Sweep| Trace| Color| Line Style| Thick| Data| Axis Comment
---|---|---|---|---|---|---
1| 1| Yellow| Solid| 1| Anlr. Phase| Left
2| 1| Red| Solid| 1| Anlr. Phase| Left
3| 1| Magenta| Solid| 1| Anlr. Phase| Left

Phase response: 4 Ohm (Magenta 8 O (Yellow) and open load (RED)

Sweep| Trace| Color| Line Style| Thick| Data| Axis Comment
---|---|---|---|---|---|---
1| 1| Red| Solid| 1| Anlr THD +N Ratio| Left

THD + Nvs Po 100 Hz @ 4 Ohm (Red)

Sweep| Trace| Color| Line Style| Thick| Data| Axis Comment
---|---|---|---|---|---|---
1| 1| Cyan| Solid| 1| Anlr THD +N Ratio| Left

THD + Nvs Po 100 Hz @ 8 Ohm (Cyan)

Physical Data

Dimension: 19″ 6.5″ 1.8″ (1U Space)
New Weight: 8 Lbs.
Sound Town Inc. accepts no liability for any loss which may be suffered by any person who relies either wholly or in part upon any description, photograph, or statement contained herein. Technical specifications, appearances and other
information are subject to change without notice.
For the applicable warranty terms and conditions. including additional information regarding Sound Town’ s limited warranty, please see details online at: https://www.soundtown.com/pages/return-warranty

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